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Date: Wed, 18 Jan 2006 18:29:35 -0800 (PST)
Message-Id: <20060118.182935.80593235.davem@davemloft.net>
To: greearb@candelatech.com
Cc: trond.myklebust@fys.uio.no, linux-kernel@vger.kernel.org
Subject: Re: Can you specify a local IP or Interface to be used on a per
 NFS mount basis?
From: "David S. Miller" <davem@davemloft.net>
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From: Ben Greear <greearb@candelatech.com>
Date: Wed, 18 Jan 2006 18:21:26 -0800

> When a socket is created, you can optionally bind to local IP,
> interface and/or IP-Port.  Somewhere, NFS is opening a socket I
> assume?  So, is there a way to ask it to bind?

Things like net/sunrpc/xprtsock.c:xs_bindresvport() will bind,
but to a specific port.  It leaves the address field all zeros
which makes the kernel pick a default.

net/sunrpc/svcsock.c does something similar, you can get it
to use a particular port but it uses INADDR_ANY for the
address during the bind().